英语词汇“dichogamy”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

dichogamy

/dʌɪˈkɒɡəmi

noun [mass noun] Botany

The ripening of the stamens and pistils of a flower at different times, so that self-fertilization is prevented. Compare with homogamy (sense 3).However, the form of dichogamy (protogyny and protandry) is likely to have different consequences for autogamy versus geitonogamy....

Flowering plants have several mechanisms that have evolved to prevent self-fertilization, e.g. self-incompatibility systems, heterostyly and dichogamy.
However, if flowering is asynchronous and the behaviour of individual pollinators does not follow a regular pattern within a plant, dichogamy might have little effect on reducing geitonogamy.

Derivatives

dichogamous

adjective ...

Darwin deduced that the first flowers to open sometimes aborted because they were of no use in dichogamous hermaphrodite plants.
Flowers are unisexual, dichogamous in nature and, thus, most species are open-pollinated.
The breeding system of the dichogamous hermaphrodite species Silene acutifolia, endemic to north-west Spain and north and central Portugal, is examined.

Origin

Mid 19th century: from Greek dikho- 'apart, in two' + gamos 'marriage'.

单词	dichogamy
释义	dichogamy /dʌɪˈkɒɡəmi / noun [mass noun] Botany The ripening of the stamens and pistils of a flower at different times, so that self-fertilization is prevented. Compare with homogamy (sense 3).However, the form of dichogamy (protogyny and protandry) is likely to have different consequences for autogamy versus geitonogamy.... Flowering plants have several mechanisms that have evolved to prevent self-fertilization, e.g. self-incompatibility systems, heterostyly and dichogamy. However, if flowering is asynchronous and the behaviour of individual pollinators does not follow a regular pattern within a plant, dichogamy might have little effect on reducing geitonogamy. Derivatives dichogamous adjective ... Darwin deduced that the first flowers to open sometimes aborted because they were of no use in dichogamous hermaphrodite plants. Flowers are unisexual, dichogamous in nature and, thus, most species are open-pollinated. The breeding system of the dichogamous hermaphrodite species Silene acutifolia, endemic to north-west Spain and north and central Portugal, is examined. Origin Mid 19th century: from Greek dikho- 'apart, in two' + gamos 'marriage'.
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